Acer palmatum 'Atropurpureum' (Японски червен клен)

Acer palmatum 'Atropurpureum', also known as the "purple Japanese maple," is an iconic cultivar of the Acer palmatum species from the Sapindaceae family. This deciduous shrub or small tree is renowned for its intensely purple foliage, which provides a striking contrast in gardens. Native to Japan, 'Atropurpureum' is a popular choice for ornamental landscapes, Japanese gardens, and bonsai, thanks to its vibrant colors and elegant shape.

Appearance of leaves, flowers, and fruits

• Leaves: The leaves are palmate, with 5-7 slender lobes, a deep red-purple in spring, which can shift to a darker purple or bronze in summer, depending on sun exposure. In autumn, the leaves turn into spectacular shades of bright red or crimson-purple, creating an impressive visual effect. The leaves are medium-sized, 5-8 cm, with finely serrated edges, giving a delicate look.
• Flowers: The flowers are small, purple, grouped in discreet clusters, appearing in April-May. They are not ornamental but attract pollinators such as bees.
• Fruits: The fruits are paired samaras, initially reddish, turning brown at maturity, 1-2 cm long. They appear in summer but do not significantly contribute to the plant’s appearance.

Growth characteristics

• Height and width: It grows as a shrub or small tree, reaching 4-6 meters in height and 4-5 meters in width under natural conditions, with a rounded, arching crown. Its slow growth makes it suitable for medium-sized gardens.
• Vigor: It has slow to moderate growth, with fine but sturdy branches and a graceful habit.
• Type: It is a deciduous shrub/tree with a branched structure that highlights the colorful foliage.

Growing conditions

• Exposure: Prefers partial shade or filtered sunlight, ideally under trees with sparse crowns or near an east-facing wall. Full sun intensifies the purple color but can scorch the leaves in hot climates. Dense shade may lead to greener foliage.
• Soil: Requires fertile, well-drained soil with a slightly acidic to neutral pH (5.5-7). A mix of garden soil, compost, and peat is ideal. It does not tolerate waterlogged or calcareous soils.
• Watering: Needs regular watering, keeping the soil consistently moist but not flooded. A layer of organic mulch (e.g., bark) helps retain moisture.
• Pollination: Flowers attract pollinators, but the fruits are not important for ornamental value.

Care and hardiness

• Hardiness: It withstands temperatures down to -20°C (zones 5-8), making it suitable for temperate climates, including Romania. Young leaves may be damaged by late frosts, and branches might need protection during harsh winters.
• Fertilizing: Apply a balanced fertilizer (e.g., 10-10-10) in early spring to encourage growth. Avoid excess nitrogen, which can reduce the intensity of the purple color.
• Pruning: Prune minimally in January-February to remove dead or crossing branches and maintain shape. Heavy pruning can affect the natural appearance.
• Pests and diseases: May be affected by mites, aphids, or verticillium wilt. The purple foliage is sensitive to sunburn under extreme conditions. Good ventilation and drainage prevent problems.
• Wildlife: Flowers attract bees, and the samaras may be eaten by small birds.

Uses

Acer palmatum 'Atropurpureum' is ideal for Japanese gardens, cottage-style landscapes, or as a solitary plant in medium-sized gardens. The purple foliage creates a dramatic contrast with plants such as hostas, ferns, or white roses. It can be grown in containers on terraces but requires protection from wind and cold. It is perfect for adding depth and color to ornamental landscapes.

Origin

Acer palmatum is native to Japan, Korea, and China, where it grows in temperate forests. The 'Atropurpureum' cultivar was selected in Japan for its intense purple foliage and is one of the oldest and most widely grown Japanese maple varieties. Its global popularity is due to its distinctive color and versatility in landscape design.

Possibility of turning Acer palmatum 'Atropurpureum' into bonsai

Acer palmatum 'Atropurpureum' is an excellent choice for bonsai due to its medium-sized leaves, dramatic purple color, and slow growth, which facilitates shaping.

Height with pot included approx. 30 cm

Leaf shade varies depending on growing conditions.

⚠️ Disclaimer: Acer palmatum leaves are delicate and may show small imperfections (marginal burns, spots, or tears), especially after transport or during periods of excessive heat. These aspects do not affect the plant’s health, which regenerates its foliage in the following growth cycles.